MC-71 Posted November 3, 2021 Share Posted November 3, 2021 Can anyone that has there Monte apart confirm the sizes of the AC Flex Hoses in the dash. I think the Right side is 3 1/4” . ID and the two smaller ones are 1 3/4” ID. Can you measure them for me and measure the length of the three. I included pictures from the Assembly Manual. I also found a suppler for these hoses but I need the correct size. I’ll post that info soon. The small hoses connect to the lap vents. Quote Link to comment Share on other sites More sharing options...
Leghome Posted November 3, 2021 Share Posted November 3, 2021 I got my hoses from the Parts Place Inc. I tried to find the order but had no luck so I am unsure of the sizes. Quote Link to comment Share on other sites More sharing options...
Dtret Posted November 3, 2021 Share Posted November 3, 2021 If all goes well I can let you know next week when I start assembly on mine. I ordered what I hope is the correct size but we will wait and see. Quote Link to comment Share on other sites More sharing options...
cbolt Posted November 3, 2021 Share Posted November 3, 2021 https://www.thepartsplaceinc.com/product/1972/1972-chevrolet-monte-carlo-defroster-fresh-air-or-a-c-hose-oe-cloth-3-dia-3-stick/4046 Its this one Quote Link to comment Share on other sites More sharing options...
MC-71 Posted November 4, 2021 Author Share Posted November 4, 2021 James did you install this 3” flex hose on the plenum box and the other end on the vent? Quote Link to comment Share on other sites More sharing options...
cbolt Posted November 4, 2021 Share Posted November 4, 2021 This hose fits between the plenum box and the passenger dash vent next to the glove box. I didnt have to replace the lap vent hoses. I guess the answer is yes to your question Carl. I did my car and another members car with the same hose, you just have to trim it to length. Quote Link to comment Share on other sites More sharing options...
MC-71 Posted November 4, 2021 Author Share Posted November 4, 2021 Thanks James. That link you posted is for a 3” flex. There is no way that will fit our Montes. 3 1/4” ID fits and that takes some effort to get it on. The vendor sent me 3” and then they sent me 3 1/4” and that took a week to get it. I almost bought a 3 1/2 from Mc master & Carr. What a pain. Quote Link to comment Share on other sites More sharing options...
cbolt Posted November 5, 2021 Share Posted November 5, 2021 Well that is the link from my records and my invoice and currently installed in my car. Dont know what else to tell you. Quote Link to comment Share on other sites More sharing options...
Dtret Posted November 12, 2021 Share Posted November 12, 2021 There you go 3 1/4. I had to doctor the three it got torn off. Quote Link to comment Share on other sites More sharing options...
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